MTM Design Pics

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When a company submit the T/S for a specific driver, do they care about the air gap behind the cone and the volume of the driver itself or it has nothing to do with the needed enclosure size? Do we have to care about its volume when we compute a box ?
 
to get the required volume of your enclosure, for the sealed enclosure, did you just get the required volume of one woofer then multiplied it by 2?
I model both drivers together (wired in parallel) using Unibox and let the app spit out the numbers.

When a company submit the T/S for a specific driver, do they care about the air gap behind the cone and the volume of the driver itself or it has nothing to do with the needed enclosure size? Do we have to care about its volume when we compute a box ?
Whether the manufacturers care or not, I don't know. But you should take the driver displacement into account when designing a box, more so for large drivers as the basket/magnet structures can be of some significant volume (although this is minor in most cases).

I use the volume of a frustrum cone to calculate speaker displacement.
 
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